Sure, you can find a slightly updated version of the code in the attachment, licensed under the two clause BSD license and without the syntax error.<br><div class="gmail_quote"><div><br>Thank you very much for being willing to share this code under the BSD license. I will try this out and see if it does the job for us.<br>
<br> </div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
It would be even better if you could try to integrate the functionality into Twisted itself, if the core developers agree that it would be useful. I opened a ticket for this:<br>
<br>
<a href="http://twistedmatrix.com/trac/ticket/4073" target="_blank">http://twistedmatrix.com/trac/ticket/4073</a><br>
<br></blockquote><div><br>Yes, it would be nice if this was in twisted itself. I will probably include it in IPython for now and see how it works for us - use that as a medium term test of the approach. I will provide feeback and any changes to the twisted ticket as appropriate.<br>
<br>Thanks again,<br><br>Brian<br> </div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Regards,<br>
Ziga<br>
<br># Copyright (c) 2009 Ziga Seilnacht. All rights reserved.<br>
#<br>
# Redistribution and use in source and binary forms, with or without<br>
# modification, are permitted provided that the following conditions are met:<br>
#<br>
# 1. Redistributions of source code must retain the above copyright notice,<br>
# this list of conditions and the following disclaimer.<br>
# 2. Redistributions in binary form must reproduce the above copyright notice,<br>
# this list of conditions and the following disclaimer in the documentation<br>
# and/or other materials provided with the distribution.<br>
#<br>
# THIS SOFTWARE IS PROVIDED BY THE FREEBSD PROJECT ''AS IS'' AND ANY EXPRESS OR<br>
# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF<br>
# MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO<br>
# EVENT SHALL THE FREEBSD PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,<br>
# INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,<br>
# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,<br>
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF<br>
# LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE<br>
# OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF<br>
# ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.<br>
<br>
<br>
import os<br>
import sys<br>
import msvcrt<br>
<br>
try:<br>
import win32con<br>
import win32process<br>
import win32security<br>
import win32service<br>
except ImportError:<br>
win32process = None<br>
<br>
from twisted.python import win32<br>
<br>
<br>
<br>
def getPythonArgs():<br>
"""<br>
Return the list of command line args that were used to start<br>
the current Python interpreter and were not stored in C{sys.argv}.<br>
<br>
These are the options that control the Python interpreter itself,<br>
like the Python executable, optimization level, warning filters,<br>
division behaviour and literal string handling.<br>
"""<br>
args = [sys.executable]<br>
for warnoption in sys.warnoptions:<br>
args.append("-W")<br>
args.append(warnoption)<br>
if type(1 / 2) is not int:<br>
args.append("-Qnew")<br>
if type("") is not str:<br>
args.append("-U")<br>
if not __debug__:<br>
if getPythonArgs.__doc__ is None:<br>
args.append("-OO")<br>
else:<br>
args.append("-O")<br>
return args<br>
<br>
<br>
<br>
def daemonize():<br>
args = [os.path.abspath(__file__)] + sys.argv<br>
executable = sys.executable<br>
cmdline = win32.quoteArguments(getPythonArgs() + args)<br>
inherit = False<br>
priority = win32process.GetPriorityClass(win32process.GetCurrentProcess())<br>
flags = (win32process.CREATE_BREAKAWAY_FROM_JOB | # session leader<br>
win32process.CREATE_NEW_PROCESS_GROUP | # group leader<br>
win32process.DETACHED_PROCESS | # no controlling terminal<br>
priority)<br>
info = win32process.STARTUPINFO()<br>
win32process.CreateProcess(executable, cmdline, None, None,<br>
inherit, flags, None, None, info)<br>
# Do what exec* functions do, let the OS do the cleanup.<br>
os._exit(0)<br>
<br>
<br>
<br>
def daemonize2():<br>
args = [sys.argv[1], "--nodaemon"] + sys.argv[2:]<br>
executable = sys.executable<br>
cmdline = win32.quoteArguments(getPythonArgs() + args)<br>
inherit = True<br>
priority = win32process.GetPriorityClass(win32process.GetCurrentProcess())<br>
flags = (win32process.CREATE_NO_WINDOW | # create an invisible console<br>
win32process.CREATE_NEW_PROCESS_GROUP | # group leader<br>
priority)<br>
attributes = win32security.SECURITY_ATTRIBUTES()<br>
attributes.bInheritHandle = True<br>
station = win32service.CreateWindowStation(None, 0,<br>
win32con.GENERIC_READ |<br>
win32con.GENERIC_WRITE,<br>
attributes)<br>
station.SetProcessWindowStation()<br>
sname = win32service.GetUserObjectInformation(station,<br>
win32service.UOI_NAME)<br>
dname = str(os.getpid())<br>
desktop = win32service.CreateDesktop(dname, 0,<br>
win32con.GENERIC_READ |<br>
win32con.GENERIC_WRITE,<br>
attributes)<br>
desktop.SetThreadDesktop()<br>
null = os.open("NUL", os.O_RDWR)<br>
handle = msvcrt.get_osfhandle(null)<br>
info = win32process.STARTUPINFO()<br>
info.lpDesktop = "%s\\%s" % (sname, dname)<br>
info.dwFlags = win32process.STARTF_USESTDHANDLES<br>
info.hStdInput = info.hStdOutput = info.hStdError = handle<br>
win32process.CreateProcess(executable, cmdline, None, None,<br>
inherit, flags, None, None, info)<br>
# Same as above, exit as fast as posible.<br>
os._exit(0)<br>
<br>
<br>
<br>
if __name__ == "__main__":<br>
daemonize2()<br>
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<br></blockquote></div><br>